* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
}

.login-wrapper {
    width: 100%;
    max-width: 700px;
}

.login-card {
    background: #fff;
    border-radius: 16px;
    padding: 40px 35px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.15);
}

.login-header {
    text-align: center;
    margin-bottom: 35px;
}

.login-header .icon {
    width: 70px;
    height: 70px;
    background: linear-gradient(135deg, #667eea, #764ba2);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 15px;
}

.login-header .icon i {
    font-size: 30px;
    color: #fff;
}

.login-header h3 {
    font-size: 24px;
    font-weight: 700;
    color: #333;
    margin-bottom: 5px;
}

.login-header p {
    font-size: 14px;
    color: #888;
}

.form-group {
    position: relative;
    margin-bottom: 22px;
}

.form-group label {
    display: block;
    font-size: 14px;
    font-weight: 600;
    color: #555;
    margin-bottom: 8px;
}

.form-group .input-wrapper {
    position: relative;
}

.form-group .input-wrapper input {
    width: 100%;
    height: 48px;
    padding: 0 45px 0 45px;
    border: 2px solid #e0e0e0;
    border-radius: 10px;
    font-size: 15px;
    color: #333;
    transition: all 0.3s ease;
    background: #fafafa;
    outline: none;
}

.form-group .input-wrapper input:focus {
    border-color: #667eea;
    background: #fff;
    box-shadow: 0 0 0 4px rgba(102, 126, 234, 0.1);
}

.form-group .input-wrapper input.error {
    border-color: #e74c3c;
    box-shadow: 0 0 0 4px rgba(231, 76, 60, 0.1);
}

.form-group .input-wrapper .input-icon {
    position: absolute;
    left: 16px;
    top: 50%;
    transform: translateY(-50%);
    color: #aaa;
    font-size: 16px;
    transition: color 0.3s ease;
}

.form-group .input-wrapper input:focus ~ .input-icon {
    color: #667eea;
}

.form-group .input-wrapper .btn-toggle-password {
    position: absolute;
    right: 12px;
    top: 50%;
    transform: translateY(-50%);
    background: none;
    border: none;
    color: #aaa;
    cursor: pointer;
    font-size: 16px;
    padding: 5px;
    transition: color 0.3s ease;
}

.form-group .input-wrapper .btn-toggle-password:hover {
    color: #667eea;
}

.alert-error {
    background: #fef0ef;
    border: 1px solid #fde2e1;
    border-radius: 10px;
    padding: 12px 16px;
    margin-bottom: 20px;
    display: flex;
    align-items: center;
    gap: 10px;
    color: #e74c3c;
    font-size: 14px;
}

.alert-error i {
    font-size: 18px;
    flex-shrink: 0;
}

.btn-login {
    width: 100%;
    height: 48px;
    background: linear-gradient(135deg, #667eea, #764ba2);
    border: none;
    border-radius: 10px;
    color: #fff;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
}

.btn-login:hover {
    background: linear-gradient(135deg, #5a6fd6, #6a4192);
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(102, 126, 234, 0.4);
}

.btn-login:active {
    transform: translateY(0);
}

.btn-login i {
    font-size: 18px;
}

.login-footer {
    text-align: center;
    margin-top: 25px;
    padding-top: 20px;
    border-top: 1px solid #eee;
}

.login-footer span {
    font-size: 13px;
    color: #888;
}

.login-footer span i {
    margin-right: 4px;
    color: #e74c3c;
}